An Intro to LiFi, the Wireless Technology Using Beams of Light
LiFi stands for Light Fidelity. It uses visible light communication for high-speed wireless communication, as opposed to WiFi which uses radio frequencies.
LiFi uses LED bulbs to transmit data via light flashes that are faster than the human eye can perceive. These light flashes can be modulated and encoded with data.
A photodiode receiver is used to detect the light signal and convert it back into the original data.
LiFi can achieve speeds of up to 224 Gbps in lab conditions. Real world speeds are currently in the range of 50-100 Mbps.
LiFi has a much shorter range than WiFi, typically 10-20 meters. It can only operate where there is direct line-of-sight between the LED transmitter
LiFi does not interfere with radio signals, so it can safely be used in environments like hospitals and aircraft. It is more secure than WiFi since light cannot penetrate walls.
It provides strong security since light can't penetrate walls and has very restricted range.
LiFi is currently used in niche applications like underwater communication, hospitals, museums, and aircraft. It may become more widespread if costs come down.
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